expression
those who know do not speak; those who speak do not know
A proverb from the Dao De Jing, often quoted to suggest that true wisdom is silent and that those who talk a lot may lack deep understanding.
「知る者は言わず言う者は知らず」という言葉は、老子の教えに由来する。
The saying 'Those who know do not speak; those who speak do not know' originates from Laozi's teachings.
彼は会議でいつも黙っているが、まさに知る者は言わず言う者は知らずだ。
He always stays silent in meetings, which is exactly a case of 'those who know do not speak; those who speak do not know.'